Sensors & Feedthroughs

Easy Rate Dual Sensor


Product configurator

Gemini™ MxG5xx

Sensor version
Ionization chamber
Emmision current
Flange connection to vacuum chamber
Switching function
Electrical connection
Digital interface
Analog output signal
Your configuration
Gemini™ MxG5xx
Switching functions
Electrical Connection
FCC, 8-pin
Digital Interface
Measurement range
1.2 - 8.68 V
Personal information
Gemini™ MxG5xx
Gemini™ MAG500
Your configuration has been successfully sent!

Easy Rate Dual Sensors offer a simple and inexpensive solution for QCM applications where one crystal may not be enough. A shutter covers a second crystal until it is needed to finish the process. The Easy Rate Dual Sensors uses two in-vacuum cables for easy field replacement.

The compact design of the Easy Rate Dual Sensor requires only 32.5 mm (1.3 in.) of clearance, allowing the sensor and shutter assembly to pass through a standard CF40 nipple.

Easy Rate Dual Sensors are available in standard and right angle orientations, and they can be configured to include a feedthrough with or without bored-through tube fittings.

Note: Easy Rate Dual sensors use 4.8 mm (3/16 in.) outer diameter (OD) water cooling tubes.  They are not compatible with Ultra-Torr equipped Front Load Sensor feedthroughs and require a tubing adapter in order to be welded to a standard feedthrough with 4.8 mm (3/16 in.) OD water cooling tubes.


  • Dual crystals
  • Low in price, high in quality
  • Front load crystal holder
  • Includes crystal shutter
  • Easy installation
  • Available in standard and right angle configurations
  • Sensor / Feedthrough combinations available with or without bored-through tube fittings


Maximum bakeout temp with no water130° C
Maximum operating isothermal environment temperature with minimum water flow400° C
Crystal ExchangeFront loading; shutter moves to the side for easy access to the holders
Feedthrough2 pass water and 1 pass air 4.76 mm (0.188 in) OD with 2 microdot coaxial connections
Water TubesS-304, 4.76 mm (0.188 in) OD x 0.51 mm (0.020 in.) wall thickness seamless stainless steel tubing
Feedthrough Specifications-CF40 (2-3/4 in. ConFlat)
Materials304 stainless steel, Teflon, ceramic, beryllium nickel
TemperatureOperational environment to 450° C with water cooling or 165° C without
MountingMates with 2 ¾ in. ConFlat type flanges with 1.375 in. I.D. min.
Download full specifications
Easy Rate Sensor FeedthroughsEasy Rate Sensor Feedthroughs
Quartz Monitor CrystalsQuartz Monitor Crystals

Spare Parts

Part NumberDescription
784-205-G1Crystal Retainer Assembly
784-403-P1Crystal Finger Spring
784-204-G1Crystal Holder Assembly
784-404-P1Retaining Ring
784-300-P1Crystal Holder
784-405-P1Holder Finger Spring
750-174-P2Female coax
080-011-P3SCREW 0-80 x .125 LG SLOT PAN HD SS GP
080-013#0-80 Split washer
784-206-G1Easy Rate Sensor Actuator Assembly
784-203-G1Easy Rate Right Angle Dual Sensor Head
784-306-P1Easy Rate Sensor Actuator Clamp
084-054SSplit Washer #4 Stainless Steel Spare
084-027Socket Screw
784-307-P1Easy Rate Dual Sensor Shutter
783-500-023In-vacuum cable, 25.4 cm (10 in.)
783-500-024In-vacuum cable, 76.2 cm (30 in.)
We require your consent for video content
More Information